Question
Using suitable identities, evaluate the following. $(49)^2$
✓
Answer
$(49)^2$
$= (50 - 1)^2$
$= (50)^2+ 12 - 2 × 50 × 1$
$= 2500 + 1 - 100 = 2401$
$= (50 - 1)^2$
$= (50)^2+ 12 - 2 × 50 × 1$
$= 2500 + 1 - 100 = 2401$
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